Carbon-scraping tool



Patented Oct. 10, 1922.

ealw/a/e/s ILIIIIIWW D. A. WALTERS. CARBON SCRAPING TOOL APPLICATION FILED )UNE 7, ISIS.

I M/ w r 2 0 3 I I I IIIIIII a 3 8 7 m I. M. l III] u. MII. 7 nu le 1 I` Il; |I If IIIFI rf III 2 H III/I IIII Patented Oct. l0, i922.

- unirnos srnfrns rana@ r rie is.

DEAN A. wALTEEs/OE TOLEDO, OHIO,` AssIGNon To THE wiLILYsrovEELAND OOM- y PANY, or TOLEDO, OHIO, .a CORPORATION OE OHIO.

CARBON-SCRAIEING TOOL. 1

Application led June 7,

To all whom t may concern; Be it known that I, DEAN A. WnLTERs, a citizen `of the United States, residing at rToledo, in the county of Lucas and State of Ohio, have invented certain'new and useful Improvements in Carbon-scraping Tools, of which I declare the following to be a full, clear, and exact description.

The present invention relates to a carbon scraping tool and has for its object to provide a tool adapted` to be inserted thro-ugh a more `or less restricted opening, such as the relatively small bore formed .through the head of an internal combustionengine cylinderfor receiving the spark plug,V the tool being provided with shiftable knives movable to operative position within the en.- gine cylinder, after being inserted thro-ugh said opening, to effect the scraping oflboth `the piston and cylinder heads on the inner faces thereof. l f

A further object ofthe invention is to provide a carbon scraping `tool comprising a guide or holder upon which is recipro- "cally mounted a rod for .moving a pair of pivotally connected members from a normal alined position uponf thevholder into angular relationship therewith, either orpboth of said pivotal members when in said angular position serving as knives or Scrapers for removing carbon from opposing surfaces between which the knives are adapted to operate. f i i l Further objects, `and Vobjects, relating to economies of manufacture and details of construction, will definitely appearfrom the detailed description to follow: y

f 'the accompanying drawino I accomplish the obJects of invention by the devices and` meansv described inthe following specification. "My invention is clearly defined and pointed out in theappended claims. Y y p A structure constituting a preferred embodiment of my invention is illustrated in gs, forming a part of this specification, 'in which:

Fig. -I is a-sectional elevation through an` internal combustion engine cylinder, showing the lower tool blade or knife in f I operative position upon a piston within `the cylinder. y

` Fig. II is a fragmentary sectional elevation. showing the upper tool blade or knife in voperative position upon the inner` surface of the dome-shaped head of the cylinder.

191s. serial no. 232,663.

Fig.` III is ian" enlarged, detail, sectional View through the knife holder with the knives shown in normal position therein.

Fig. IV is an enlarged, detail view of the lower portion ofthe tool showing the knives in ,expanded or operative position.

Fig. Vis a transverse sectional view taken through the upper knife on line V-V of Fig. III, and 5 i l Fig. VI is a similar sectional view taken on line VI-f-VIof Fig. III.

`InA the drawings,` similar `reference nun nierals refer to similar parts throughout the `several views and the sectional views are taken looking in the `direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawings, l represents the cylinder of an internal combustion engine upon which is mounted the dome-shaped head 2 carrying the cup` 3 .into which the spark plug (not shown) is normally screwed.

In` the preferred embodiment of the invention, I .have shown the carbon scraping tool applied to a Knight sleeve valve motor but it will be understood that the invention is readily applicable to other types of engines and I therefore do not 'wish tolimit its use to the type shown or to any particular type of internal combustion engine, or other yfuel burning apparatus-` Y Mounted within the cylinder l are the inner and outer sleeves a and 5, respectively, the piston G beingimovable within the former to any desired position ywith respect to the cylinder head when the carbon is to be removed from said `piston by inserting the scraping tool within the cylinder and turnv ing it after the knife has been moved to operative position. l

In the preferred embodiment Vof the invention I provide a holder 7 whichis prefotal member 10 and is also provided with a piln 11 extending into an elongated slot l2 in the knife-l0, said slot having convergently arranged sides 18 and 14 upon which the pin moves when the knife is'actuated by movement ofthe rod, said, knife being provided with a cutting or scraping edge 15, as shown in Fig. V. The knife 10 is pivoted at 16 to the inner end of the outer knife or pivotal member i7 lwhich is provided with a cutting llO or scraping edge 18, as clearly shown lin Fig. Vl. rlhe knife or pivotal member 17 is pivoted upon the transversely disposed pin 19 of the tube 7, said pin being extended through the elongated slot 2O formed in the outer end of the knife. By making the slot 20 of a greater length than. the diameter of the pin, the curved or cutting edge of the knife Will become more readily adjusted to the curved face 21 of the pist-on head during the operation of the tool, it being undeistood that the cutting edge of each of the lknives Will be shaped to fit the contour of the respective surfaces upon which they are adapted to operate. Likeivise the slot 14 of the knife 10 will permit adjustment of the latter upon the pin ll, so that the scraping or cutting edge of the knife will readily adjust itself to the curved face of the cylinder head 2 When the rod is actuated tothe osition slioivn in Fig. 1I.

rlhe knives of pivotally connected members 10 and 17 are movable from normal position Within the tubular holder to operative or angular position with respect thereto through the longitudinal slot Q2 formed in said holder by sliding the Vrod 8 to the position shovrn in lfig. 1 and during this period of operation the lower end of the knife 1i' is moved into the slot 23, at the base of which an almtment 24; for limiting` the movement Y the knife upon its pivot, whereby said knife is held at the desired angular position with respect to the tubular holder'.

vAslot Q5 is cut in the tube 7 opposite 'the upper end of the slot Q2 to receive the back edge of the knife 10 as shown in Fig. lll. The shoulder or abutment 2G which is formed at `the'bottom of the slot 25 is preferably beveled or tapered inwardly and dovxnvvardl'7 to receive the corres )ondinojl e Y inclined surface 2l upon the back edge of l knife 1() near the center thereof which 1 u n 1 rires as a pivot ioint about which the knife n s j' n v is rocl'ed during` its initial movement, thereA bj' facilftating the movement of the knife oth d vardly and outwardly to carry l e om lo past the dead center and permit he knives and rod 8 to drop by gravity.

'.lfhe pivotal movement of the knife l() upon the shoulder QG is further facilitated bythe action of the pin 1l moving down upon the inclined surface 11i when the rod S 1' it shed inwardly, for the reason tl at said pri` is moved in a straight line, thereby vhrowina` the upper end of the knife outwardly tl'irough the slot Q5 and consequently movine' the loiver end in an opposite direction through the slot 22, during which time of course the knife is given both a pivotal and longitudinal movement. lui'ing this period of operation it Will be understood that the beveled surface 27 of the knife `also slides on the inclined shoulder QG of the tube i, as before stated, and that thereafter the back edge of the knife will move upon said shoulder until said knife is brought substantially into operative position.

ln order that the knives may be held more or less rigidly in their loiverinost position to effect the best results when turning the same upon the surfaces to be scraped, l provide at the upper end of the knife l0 a slightly tapered surface 28 upon which the abutment or beveled surface Q9 of the rod 8 rides when the tapered surface 30 of the knife passes belorv the shoulder 2b and into frictional engagementwith the inner Wall of the tube, as shown in Fig. ll. By this means the upper end of `thcknife 10 is wedged between the beveledsurface 29 of the rod 8 and the inner surface of the tube and is thereby rigidly held in the desired position when operated.

The knife 10 is also provided vfith a beveled surface 31 reversely inclined With respect to the suri''aces 28 and BO 4and Which normally also as a means for clamping or locking the rod upon the tube when the knives have been set in the desired operative position as Well as when in normal position. i

The tube S is provided Witha sleeve bean ing 311- Whicli is preferably shaped to snugly lit the spark plug cup 3, as shown in Fig. I, said sleeve serving to hold and steady the tube i" Whenthe latter is rotated by means of the handle 35 at the outer end thereof.

The bearing is adapted to be locked in any desired position upon the tube by .means of the thumb screwT e6, as shown in Fig. l.

liVhen it is desired to remove the tool from the cylinder or other receptacle into which it may have been projected, it is only necessary to loosen the thumb screiv 32 and raise the rod `until the parts assume' the position shown in lll.

fter the accumulated carbon has been scraped from the piston and cylinder heads, as above described, the same Will be blown out through the exhaust ports 37 and 38 of the sleeves 4i and 5, respectively, into the ei:- haust pipe when the engine is started and thereby discharged from the cylinder,

l amaivare that the particular embodiment of my invention, which l have here shown and described, is susceptible oi' considerable variation Without deps ing from the spirit thereof, and. therefore, .l desire to claim the same broadly` as Well as speciii cally, as indicated by the appended claims.

lil thus described my invention, what 1 claim as'neiv and desire to secure by Letters Patent` is:

l. ln a scraping tool, the combination with a holder having an abutment thereon and a rod slidably mounted upon the holder of a moved to operative position.

2. In a scraping tool,the combination with a tubular holder, of an .operating member movable therein, and a pair of pivotally connectedknives 'normally lying Within the holder, one of Which is pivoted upon the holder and the other directly upon said operating member said knives being moved from the tubular holder when actuated to operative position.

3. In a scraping tool, the combination With a tubular holder having a` shoulder formed thereon of an operating member slidably mounted in the holder, and a pair of pivotally connected members, one of which is separately pivoted upon the holder and the other connected With said operating member, andl adapted to pivot upon saidv shoulder when said members are moved to operative position.

lfIn a scraping tool, the combination with, a holder and an operating member movable thereon,provided With a beveled surface and a pair of pivotally connected members, one of Which is pivoted upon the holder and the other upon said operating1 member, said beveled surface and said holder co-operating With said pivotal members to rigidly hold them in operative position.

5. In a scraping tool, the combination with a holdjer and an operating member movable thereon, of a pair of pivotallv connected members, one of which is pivoted upon the holder and the other onl said operating member, said operating member having an abutment thereon for `forcing the pivotal `member connectedV ytherewith into frictional engagement with the holder when said pivotal members are moved to operative position.

G. In a scraping tool, the combination with a holder and an operating member movable thereon, of a pair of knives pivotally connected at their inner ends, the outer end of one of said knives being pivoted upon the holder and the outer end ofthe other knife upon said operating member, said operating member having a beveled surface adapted to engage the knife pivoted thereon to force the same into frictional engagement With the holder when said knives are, in operative position.

7. In a scraping tool, the combination With a holder and an operating member movable thereon, of a pair of shiftable members pivotally connected at their inner. ends,

' one of which is pivoted at its outer end to the holder and the other directly to said operating member` the last mentioned shiftable member being provided with oppositely inclined beveled surfaces, one of which is adapted to frictionally engage the holder when said members are in operative position, said operating member having an abutment thereon adapted to ridel upon the other of said beveled surfaces for the purpose of rigidly holding said shiftable members in operative position.

8. In a scraping tool, the combination with a tubular holder and an operating member movable thereinof a plurality of pivo-tally connected members, and means for pivotally' connecting one of said members with said holder and the opposing member with said operating member, the member connected 'with the operating member being limited in its movement With respect thereto by engagement with the inner ivall of the tubular holder when moved to operative position.

9. In a `scraping` tool, .i the combination with a holder and an operating member movable thereon, of a pair of pivotally connected Scrapers, one of which is pivoted upon the operating member and the other upon the holder, said holder being provided with an abutment for limiting the movement of the scraper pivoted thereon.

l0. In a scraping tool, the combination With a holder having an abutment thereon of a rod slidabl'v mounted upon the holder provided with an inclined surface, and inner and outer pivotally connected members, said inner member being movably mounted upon said rod and adapted to be actuated thereby from a normal alined position with respect to the rod into angular relationship therewith and adapted to be forced into engagement with the holder by said inclined surface, and said outer member being pivoted upon said holder and adapted to be actuated by the inner pivotal member intoV engagement with said abutment.

ll. In a scraping tool, the combination With a holder, of a rod slidably mounted thereon, inner and outer pivot-ally connected members` each of which is provided with a knife edge, said inner member beine; pivotallv connected to said rod and' said outer member being` loosely connected with said holder and pivotally connected to said inner member. 1

12. In a scraping` tool` the combination With a holder provided `,vith an abutment and having a shoulder forming a pivot point thereon, a rod slidably mounted upon the holder, and inner and outer pivotally connected members, said inner member being adapt-ed to be actuated by said rod about said pivot point and said outer member pivoted upon said holder and arranged to en- ,gage said abutment when moved to operative position. i

I3. In a scraping tool, the combination vvith a tubular holder having a shoulder thereon, a rod slidably mounted in the CIK holder and a knife pivotally connected to and adapted to be actuated by the rod into and out of the holder upon movement of the rod in opposite directions and te pivot upon said shoulder when moving out of the holder.

14.. l'n a scraping tool, the combination with a tubular holder and a rod slidably mounted in the holder, of a pair ofpivotally connected members, one of which is pivoted upon the rod and the other directly upon the holder, said members being adapted to nor mally lie within the tubular holder and arranged to be projected through a slot formed therein by movement of the rod.

l5. ,ln a scraping tool, the combination With a tubular helder and a rod slidably mounted in the holder, of a pair of pivotally connected members, one of Which is pivoted upon the rod and the other directly upon the holder, said members being adapted to normally lie within. the holde and arranged to be projected through slot formed therein by movement of the rod, and means for locking the rod upon the holder in various positions of adjustment thereon.

16. in a scraping tool, the combination with a tubular holder and a rod slidably mounted therein, a scraping tool normally lying Within the holder and arranged to be projected through slot formed therein upon movement of the rod in one direction and to he returned to normal posV ion when the rod is moved in an opposite direction, and means extending through a slot in the holder for sliding and locking tie rod with in the holder.

1T. ln a scraping tool, the combination with a tubular holcer and a rod slidably mounted therein, a pair of pivotally @ein nected knives normally ly' Within the holder and arranged to be jected through ,A a slot formed therein upon mo Yement of the rod in one direction and to be returned to normal position when the rod is moi/ed in an opposite direction, and a thumb screw projecting through a slot formed in the holder into engagement with the rod for moving and locking the same within said holder.

18. ln a scraping tool, the combination With a tubular holder and a rod slidably mounted'theiein, a knife Within the holder pivotally connected directly to said rod and a link connection between the knife and holder loosely pivoted upon the latter. said knife and link being adapted to be projected from the tubular holder through a slot formed therein by movem 3 of the rod.

19. In a scraping tool, the combination With a tubular holder, of a rod slidablj,r mounted therein, and a knife loosely pivoted upon the rod, a second knife pivotally connected with the first and loosely pivoted upon the holder, said knives norm ally lying Within the holder and adapted to be projected through a slot formed therein, said holder being insertable in an internal combustion engine cylinder through an opening formed in the head thereof for removing carbon from the inner surface of said head.

20. ln a scraping tool, the combination with a tubular holder, of a rod slidably mounted therein, an operating member for said rod extending through a slot in the side Wall of the tubular holder, a knife pivoted upon said holder and a knife actuating member having one end pivoted upon said knife and the other upon said rod, said knife and actuating member normally ly- Within the holder and adapted to he projected therefrom through a slot formed therein, said tubular holder having a member adapted to engage in the spark plug socket of an internal combustion engine.

2l. In a scraping tool, the combination with a tubular holder and a bearing upon which the holder is rotatably mounted, of a rod slidably mounted in the holder, a member pivoted upon the holder, and a knife pivotcd between said member and said rod and adapted to be projected into and out of the holder through a slot formed therein.

22. In a scraping tool, the combination with a tubular holder and a rod slidably mounted therein, of a knife operatively connected with said rod normally lying Within 'he holder and adapted to be projected therefrom through a' slot formed therein upon movement of the rod in the direction of the knife said holder having a shoulder thereon intermediate the ends of the knife serving as a. pivot about which the knife is moved during its initial movement when actuated from normal position.

23. In a scraping tool, the combination with a tubular holder and a rod slidably mounted therein, of a knife operatively connected with said rod normally lying Within the holder and adapted to be projected therefrom through a slot formed therein upon movement of the rod in the direction of the knife said holder having an inclined shoulder thereon and said knife having an inclined surface adapted to 4engage said shoulder, said shoulder serving as a pivot about which the knife is moved during its initial movement when actuated from normal position.

2d. ln a scraping tool, the combination with a tubular holder and a rod slidably mounted therein, of a member operatively connected with said rod normally lying Within the holder and adapted to be projected therefrom through a slot formed therein upon movement of the rod, said member being provided with an inclined surface on the back edge thereof an abutment upon 'the holder engaging said inclined surface vio and co-operating With the same to effect a pivotal movement of said member when actuated from normal position whereby it is projected from the holder and a knife pivotally connected With said member and with said holder.

25. In a scraping tool, the combination With a tubular holder having a shoulder thereon and a rod slidably mounted therein, a knife normally lying Within the holder 'and adapted to be projected therefrom through a slot formed therein, said knife being provided With an inclined surface upon its upper end and a correspondingly inclined surface on its back edge near the center thereof normally engaging said shoulder, and a fixed pin carried by said rod and projecting into engagement with the first mentioned inclined surface.

26. In a scraping tool, the combination with a tubular holder having a shoulder thereon and a rod slidably mounted therein, a knife Within the holder having an inclined surface on its back edge normally engaging said shoulder, said knife being provided With a reversely inclined surface at its upper end adapted to be forced into engagement with the inner Wall of the tube Whenthe knife is moved to operative position, and a pin upon said rod extending into a slot formed in the upper end of the knife, said slot having convergently arranged sides With which the pin co-operates in moving the knife into and out of the holder.

27. In a scraping tool, 'the combination with a tubular holder having a shoulder thereon, and a rod slidably mounted therein, a knife Within the holder having an inclined surface on its rear edge normally engaging said shoulder, a pinupon the rod extending into a slot formed in the upper end of the knife, the latter being provided With adjacent convergently arranged surfaces, one of saidsurfaces being engaged by a beveled surface on the rod When the knife is in normal position and the other by said beveled surface When the knife is moved to operative position through a slot formed in the Wall of the holder.

2S. ln a scraping tool, the combination with a tubular holder having a shoulder thereon and a rod slidably mounted therein, a knife Within the holder having an inclined surface, intermediate its ends normally engaging said shoulder, said knife being provided at one end with a correspond- 'fngly inclined surface normally engaging a beveled surface formed on said rod and having a reversely inclined surface adjacent the last mentioned surface,` and means pivotally connecting the knife with said rod, said shoulder serving as a pivot about Which the knife is actuated during its initial movement when operated by said rod, said reversely inclined surface being movable into engagement with the inner Wall of the tubular holder when the knife is moved to operative posit-ion.

29. In a scraping tool, the combination with a tubular holder and a rod slidably mounted therein, of a pair of knife blades having cutting edges shaped to conform to the upper surface of the piston head and the lower surface of the cylinder head respectively, said knife blades being adapted when in collapsed position to be retained Within the tubular holder and when 'In ei;- tended position to project therefrom Whereby they may be brought into engagement with the upper surface of the piston head or the lower surface of the cylinder head to remove carbon therefrom.

30. ln a scraping tool, the combination 'With a tubular holder and a rod slidably mounted therein, of a pair of knife blades connecting said rod and holder and adapted when in collapsed position to be positioned in longitudinal alignment Within the tubular holder, the said knife blades being adapted to be forced into operative position out- Wardly of the holder upon relative movement of saidrod and holder.

In testimony whereof, I affix my signature.

DEAN A. VALTERS. 

